Re: [RFC] proposed IPC changes to support 32-bit UIDs

Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 1 Dec 1999 19:08:43 +0000 (GMT)

> This will only be a problem if someone wants to include the kernel headers
> directly in his/her application (did the old libc5 do it this way,
> though?)

Yes. So you just keep the old one around and name the new ones differently.

> I could have stuck in the high UID and GID in a similar manner, but this
> would mean breaking DIPC because there were only 2 32-bit words left in
> the shmid_ds structure, and one was already claimed by DIPC. In any case,
> I thought that it would be cleaner to just start over with new structures.
> I haven't looked at the relevant standards committee documents (SuS), so
> perhaps I should be leaving more space for other things...

I agree. Expand the message counts/sizes to 32bit too. We dont need to use
the top 16 yet but it will happen.

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